Yes you can. According to Chapter 5 artical 5301-5319 of the Navy Uniform Regulation any military decoration earned while serving in the army may be worn behind it's Navy equivilent (i.e. the navy equivilent has precidence over other branches). The only acception to this is the Army Service Ribbon which cannot be worn on a Navy uniform. For further questions see before mentioned regulation or contact Awards and Special Projects Office (OPNAV 09B33), Navy Yard, Building 36, First Floor, Washington DC 20350.
No, there is no medal associated with it.
No, because Naval units do not typically wear shoulder sleeve insignia (patches). There are exceptions to this rule, however. If the Naval unit was under an Army command they may be authorized the shoulder sleeve insignia, former wartime service (combat patch) of the Army command to which they were assigned.
If one removes (or alters) any military medal or award, it ceases to be the award. It is not lawful or correct. It would be just like having a medal display in incorrect order of precedence.
Navy Meritorious Unit Commendations do follow you to other branches. They are considered permanent awards from all branches, except the Army. Unit Commendations from the Army may not follow you to other branches, or even other units. As long as you were serving in the unit when the commendation was earned, it is a permanent award that you can wear on your uniform regardless of service. Otherwise, the wear of any unit award is only worn when you are actually assigned to that unit (temporary award).
Yes, there are numerous examples of Army unit attached to Marine units that earn the Navy PUC
The French Fusiliers Marins are part of the navy. Like all other sailors they wear the navy's uniform. You can see a sailor is a fusilier marin by two part of uniform : two crossed rifles on the right sleeve (red for sailors, gold for nco) and in parade unifoem, on the hat, the name of the unit...
DCPU (Disruptive Camouflage Pattern Unit)
do you wear unit awards on the dress blues for a military ball
Yes - USS BARB (SSN-596) received 2 Vietnam Campaign stars, the Battle "E", the Meritorious Unit Commendation, and a Navy Unit Commendation (1966).Her crew was also awarded the Navy Expeditionary Medal.
The Navy Expeditionary or Marine Corps Expeditionary Medal, The Humanitarian Medal (when I was there in 1982), we got a Navy Unit Commendation for saving the lives of the crew of a helocopter that crashed. We didn't get a CAR or an NDM
Army, Navy, along with the Marines as a joint unit with the Navy until 1789.
In the US Military, a "ribbon" is worn on the informal dress uniform, representing the medal. It is of the same color as the medal. There are also ribbons authorized for which no medal is used. In a dress uniform they are typically worn on the right side, while the medals are worn over the heart. You would never wear the medal and the ribbon representing the medal at the same time. Examples would be various unit citations or skill awards. The Navy issues marksmanship ribbons rather than badges. Sea Service Deployment ribbons are awarded for spending long periods of time deployed on ships or with Marine units.